66998800 has 60 divisors (see below), whose sum is σ = 175609296. Its totient is φ = 24361600.

The previous prime is 66998783. The next prime is 66998809. The reversal of 66998800 is 889966.

It is a happy number.

66998800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66998809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3214 + ... + 12013.

Almost surely, 2^66998800 is an apocalyptic number.

It is an amenable number.

66998800 is an abundant number, since it is smaller than the sum of its proper divisors (108610496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66998800 is a wasteful number, since it uses less digits than its factorization.

66998800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256 (or 15245 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 66998800 is about 8185.2794698776. The cubic root of 66998800 is about 406.1523852253.

The spelling of 66998800 in words is "sixty-six million, nine hundred ninety-eight thousand, eight hundred".